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- Factor code to destroy an ALQ out of alq_close() into a private alq_destroy().

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- Use the new alq_destroy() to properly handle a failure case in alq_open().

Sponsored by:	FreeBSD Foundation
Reviewed by:	dwmalone, jeff, rpaulo, rwatson (as part of a larger patch)
Approved by:	kmacy (mentor)
MFC after:	1 month
This commit is contained in:
Lawrence Stewart 2010-04-01 01:16:00 +00:00
parent 657c04c3f8
commit c0ea37a885
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=206026
1 changed files with 20 additions and 17 deletions
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37
sys/kern/kern_alq.c
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@ -103,6 +103,7 @@ static void ald_deactivate(struct alq *);
/* Internal queue functions */
static void alq_shutdown(struct alq *);
static void alq_destroy(struct alq *);
static int alq_doio(struct alq *);
@ -263,6 +264,18 @@ alq_shutdown(struct alq *alq)
crfree(alq->aq_cred);
}
void
alq_destroy(struct alq *alq)
{
/* Drain all pending IO. */
alq_shutdown(alq);
mtx_destroy(&alq->aq_mtx);
free(alq->aq_first, M_ALD);
free(alq->aq_entbuf, M_ALD);
free(alq, M_ALD);
}
/*
* Flush all pending data to disk. This operation will block.
*/
@ -420,8 +433,11 @@ alq_open(struct alq **alqp, const char *file, struct ucred *cred, int cmode,
alp->ae_next = alq->aq_first;
if ((error = ald_add(alq)) != 0)
if ((error = ald_add(alq)) != 0) {
alq_destroy(alq);
return (error);
}
*alqp = alq;
return (0);
@ -525,22 +541,9 @@ alq_flush(struct alq *alq)
void
alq_close(struct alq *alq)
{
/*
* If we're already shuting down someone else will flush and close
* the vnode.
*/
if (ald_rem(alq) != 0)
return;
/*
* Drain all pending IO.
*/
alq_shutdown(alq);
mtx_destroy(&alq->aq_mtx);
free(alq->aq_first, M_ALD);
free(alq->aq_entbuf, M_ALD);
free(alq, M_ALD);
/* Only flush and destroy alq if not already shutting down. */
if (ald_rem(alq) == 0)
alq_destroy(alq);
}
static int